High-thermoplasticity foam polyester

A technology of thermoplastic polyester and plasticity, which is applied in the field of foamed polyester, can solve problems such as limiting application and affecting foam performance, and achieves the effects of stable foaming process, uniform cells, and improved process stability
CN109852009APending Publication Date: 2019-06-07CHINA RESOURCES PACKAGING MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA RESOURCES PACKAGING MATERIALS CO LTD
Publication Date
2019-06-07

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Abstract

The invention relates to a high-thermoplasticity foam polyester. A preparation method of the foam polyester is characterized by comprising the steps of uniformly mixing 0.1-2 parts by weight of a needle-like structural nucleating agent, 0.1-2 parts by weight of a chain extender, 0.1-2 parts by weight of an antioxidant and 100 parts by weight of a thermoplastic polyester and performing foaming to prepare the foam polyester, wherein the needle-like structural nucleating agent is attapulgite, sepiolite, wollastonite, diopside, tremolite, crystal whiskers or other needle-like structural powder, the needle-like structural powder nucleating agent preferably has a length-diameter ratio of 3-100 and a diameter of 0.1-100 [mu]m, and the thermoplastic polyester has viscosity of 0.60-1.20 dL / g. The foam polyester provided by the invention has the advantages of a uniform and fine foam pore structure and excellent mechanical properties.
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Description

technical field

[0001] The invention relates to a foamed polyester, in particular to a high thermoplastic foamed polyester. Background technique

[0002] Polyester foamed products are made by mixing foamable polyester with nucleating agent, chain extender, antioxidant, etc. in proportion, using serial two-stage screw physical blending, introducing foaming gas and dissolving in the polymer in the melt. The driving force of the internal and external pressure difference formed by the rapid pressure relief of the die forms the bubble nucleus hot spot and the foam grows into shape, and then the rapid cooling of the shaping part, traction part, cutting part and winding and stacking part achieves a stable foaming process and uniform cells Foaming material with fine density, controllable expansion ratio and excellent mechanical properties. The thermoplastic polyester foam material is divided into sheet and plate. The sheet is mainly used in food packaging and other fields, and the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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